Saturated absorption spectroscopy of buffer-gas-cooled Barium monofluoride molecules

被引：14

作者：

Bu, Wenhao

Zhang, Yuhe

Liang, Qian

Chen, Tao

Yan, Bo ^{[1
]}

机构：

[1] Zhejiang Univ, Interdisciplinary Ctr Quantum Informat, State Key Lab Modern Opt Instrumentat, Hangzhou 310027, Peoples R China

来源：

FRONTIERS OF PHYSICS | 2022年 / 17卷 / 06期

基金：

中国国家自然科学基金;

关键词：

cold molecule; saturated spectroscopy; buffer gas cooling; BaF; HYPERFINE-STRUCTURE; COLD; ATOMS; BEAM;

D O I：

10.1007/s11467-022-1194-x

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report an experimental investigation on the Doppler-free saturated absorption spectroscopy of buffer-gas-cooled Barium monofluoride (BaF) molecules in a 4 K cryogenic cell. The obtained spectra with a resolution of 19 MHz, much smaller than previously observed in absorption spectroscopy, clearly resolve the hyperfine transitions. Moreover, we use these high-resolution spectra to fit the hyperfine splittings of excited A(v = 0) state and find the hyperfine splitting of the laser-cooling-relevant A(2)Pi(1/2)(v= 0, J = 1/2,+) state is about 18 MHz, much higher than the previous theoreti- cally predicted value. This provides important missing information for laser cooling of BaF molecules.

引用

页数：7

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